Yes you are right , it is possible that a cd has got caugh in the mid transffer and got logged in. Unless it shifts to the end position to rest will it eject well. The humming you hear is the motor trying hard to eject. Open carefuly and look inside , do not use force but try to guide the cd carefully assisting it to slide within or out of the slot. Plase rrepeat this and tthe cd will free itselt and you will have a working set. Please check all cd again before reinserting as they may be warped. helpful Good day

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Related Questions:

Something must be jammed so a trip to a Technician will resolve that. This is one of the reason I never buy changers of any kind because over the years I have had to fix so many cartridge, platter and other changers that are all designed poorly enough to make the 90 day period but not last too much longer. The Sony ES models are the best but they were big money back then- I have a broken one in my shop now.

Check your RCA cables to make sure that they are not dirty, tarnished or not completely plugged in. Also, try switching to different (working!) RCA cables to see if that fixes the noise problem. Good luck!

The CD, when inserted, became either wedged or not seated properly and the sensors dont know how to respond. Here are the codes for Kenwood. Changer Error Codes
• E-00: Poor Cable connection.
• E-01: Magazine not properly set in changer.
• E-02: No Disc in magazine.
• E-03: CD does not have selected track number.
• E-04: Disc is dirty, upside down or unreadable.
• E-10: No data is recorded on the MD. The player plays the next disc automatically.
• E-99: Changer malfunction, disc may be caught in machine or changer requires service.

If you have a steady hand... carfully unscrew and open up the unit just far enough so you can either pull, or nudge the CD tray enough for the CD to be seated in the tray properly...Good luck...

After some time it was showing some C 31 00 error. I searched on internet, opened the top cover, there is the CD changer and my cd was stuck in there, I pushed the CD from finger and there it goes... on press of eject it came out... thanks anyway...

source
http://www.kenwood.nl/support/veelgestelde_vragen/
Changer Error Codes
? E-00: Poor Cable connection.
? E-01: Magazine not properly set in changer.
? E-02: No Disc in magazine.
? E-03: CD does not have selected track number.
? E-04: Disc is dirty, upside down or unreadable.
? E-10: No data is recorded on the MD. The player plays the next disc automatically.
? E-99: Changer malfunction, disc may be caught in machine or changer requires service.
Sounds like the mech is gummed up, jammed, or a cd is stuck inside.
Get a nerd to open it up and check it over.
Luck